GHSA-fqqv-56h5-f57g: PocketMine-MP `ResourcePackDataInfoPacket` amplification vulnerability due to lack of resource pack sequence status checking

A denial-of-service / out-of-memory vulnerability exists in the STATUS_SEND_PACKS handling of ResourcePackClientResponsePacket. PocketMine-MP processes the packIds array without verifying that all entries are unique. A malicious (non-standard) Bedrock client can send multiple duplicate valid pack UUIDs in the same STATUS_SEND_PACKS packet, causing the server to send the same pack multiple times. This can quickly exhaust memory and crash the server. Severity: High — Remote DoS from an authenticated client.